Well, I am happy to answer this question for you. First, we have to classify it.
Vampires may be a disease called rabies, or a disease called porphyria, because the patient's behavior is often reminiscent of vampires, and the appearance of porphyria patients Changes will also occur (such as necrosis of the mouth and nose, etc.). Details are detailed later.
Reality
Porphyria The ancient Greek physician Hippocrates is generally considered to be the first person to recognize porphyria. At that time, he regarded the disease as A blood or lung disease. It was not until 1871 that the great German biochemist Felix Hopper-Theller discovered the causal relationship between porphyrin pigments and porphyria. In 1889, B.J. Stockwith collectively named a series of clinical symptoms "porphyria", and the name of this strange disease was established. Porphyria refers to a group of diseases, each with its own specific typical manifestations. The common feature is the large amount of excretion of a variety of porphyrins, porphyrinogens and porphyrin precursors in the urine and/or stool. Porphyrias can be divided into two major categories: erythropoietic porphyrias and hepatic porphyrias. Patients with congenital erythropoietic porphyria (CEP) are suspected to be the origin of vampire stories. Porphyria has many manifestations, and one of the more common ones is acute intermittent porphyria (AIP). The "Mad King" George III of England is one of the victims of this disease. The most severe porphyria is congenital erythropoietic porphyria (CEP), the tragic fate of its patients is suspected to be the origin of vampire stories. Although porphyria is usually caused by a genetic mutation, excessive alcohol consumption and environmental pollution can also trigger the disease. The word porphyrin comes from the Greek porphura, which means purple. According to research, the Greeks learned this word from the Phoenicians. In Phoenicia, purple pigment was extracted from purple molluscs and used to dye the robes of the royal family. Later, in the Byzantine Empire, the common saying "born to the purple" (born to purple, meaning "born to be a noble") was derived from the color purple, which symbolized nobility. Different from "holding a silver spoon in the mouth", its meaning is more noble than rich. Usually only the descendants of the royal family and nobles can deserve this description. However, those porphyria patients who are born with an unclear relationship with the purple pigment porphyrin are far from so lucky. This phytochrome, which is produced due to genetic variation in the production of heme or environmental poisoning, becomes a potent toxin once exposed to sunlight and can cause at least 8 types of porphyria. In the most severe forms of porphyria, porphyrins eat away at tissues and bodies near the gathering area, causing severe anemia, facial organ corrosion, purple-red urine, and various weird behaviors reminiscent of vampires. ——Fear of sunlight: Porphyrin is a photosensitive pigment that accumulates on human skin, bones and teeth. Most porphyrins are benign in the dark and do no harm to the body, but once exposed to sunlight, they convert into dangerous toxins that devour human muscles and tissues. Therefore, porphyria patients, like the legendary vampires, can only live in a dark world and cannot see the light. Pale face: The vast majority of porphyria patients are accompanied by severe anemia. This is not only because they usually can only live in the dark, but more importantly, the porphyrins in their bodies will affect the hematopoietic function and destroy the production of hemoglobin. . Often, people with porphyria also have large patches of pigmentation - often purple - on their bodies. Immortality: Due to the action of toxins, the ears and noses of patients with porphyria will be corroded by it, and their skin will be covered with scars, making them look particularly old. In European legends, immortal people are often described in a similar way. From time to time, there is a saying that "vampires have immortal bodies". In fact, people with porphyria often live very short lives. Teeth as sharp as wolves: When porphyrin is exposed to sunlight, it will be converted into toxins that can devour muscles and tissues. One of the main manifestations is that it will corrode the lips and gums of patients, making them reveal sharp, wolf-like teeth. Rotten gums always look bloody, inevitably reminding people of blood-sucking vampires.
Or you will say that when someone in foreign countries wakes up, there are traces on their necks that look like vampire bites. In fact, they are not vampires but a kind of bat. Vampire bats (scientific name: Desmodus) are all species of the family Batidae. The collective name for vampire bats. Vampire bats have a small body, no exposed tail, and their fur is mainly dark brown. They look very ugly and only start to be active after dark. They look for food at regular times every night - sucking the blood of animals. Different types of vampire bats also have different blood targets. Vampire bats are a unique species of blood-sucking mammals. Distributed in central and southern America, they are small in size, with the largest weight not exceeding 30-40 grams. The skull and teeth are highly specialized, with the cheek teeth tending to be reduced in number and size (small), being the most specialized species. The upper canine teeth are extremely large and knife-shaped, with extremely sharp "edges". The molars are small and functional, the thumbs are long and strong, and the hind limbs are powerful. They can run quickly on the ground and even jump short distances. Vampire bats are strong fliers, tailless, and have nose lobes. Therefore, they once belonged to the family Phyllidae and are a group that truly feeds on blood. Vampire bats have a long lifespan, with an average lifespan of 12 years.
Generally speaking, a vampire bat sucks about 100 liters of blood in its lifetime. In January 2010, a series of vampire bat bites occurred in the Peruvian Amazon, causing great panic among local residents. The Amazon Regional Health Directorate revealed that at least seven children have died of rabies after being bitten by vampire bats in recent weeks.
Vampire bats
This family has special feeding habits. They only start to be active after dark, and they regularly forage for white-winged vampire bats and hairy-legged vampire bats every night. They suck the blood of birds, while vampire bats suck the blood of mammals. They land on the ground near their hosts such as cows, horses, and deer, then climb up their forelimbs to the shoulders or neck. They use their upper incisors and canine teeth to cut through skin several millimeters thick, and lick the blood that flows out with their tongues. Occasionally, it sucks blood from the feet of domestic animals. It can beat rapidly from time to time to avoid damage caused by the defensive actions of the host's feet. The anticoagulant in the saliva of vampire bats can slow down the coagulation of blood and make blood sucking go smoothly. Each bat sucks more than 50% of its body weight in blood every night. A 34-gram vampire bat sucks about 18 grams of blood every night. Vampire bats are a nuisance because they suck so much blood that they hinder the growth of livestock in some areas and because they spread rabies and other diseases. Vampire bats occasionally suck human blood. The function of the vampire bat kidney is extremely interesting. It has the ability to significantly concentrate waste products. Vampire bats urinate shortly after feeding, quickly expelling most of the water in the blood they suck. In this way, the bat can fly back to its habitat lightly after taking a blood meal, which not only reduces energy consumption but also reduces danger. After returning to the habitat, it continues to digest the dehydrated blood until it forms a fecal mass and no longer excretes water. Generally, vampire bats will not suck human blood, but that refers to when there is plenty of food, so they sometimes suck human blood. That is what I call the traces left after being bitten by a "vampire".
But, the universe is so big, maybe vampires are a race that exists in the universe, right? And foreigners are not that bothered. If a vampire comes out for no reason, it may not be that they have actually seen it~~ Hehe, we have explored one thousandth of this world, no, not even one ten thousandth. It's like Bermuda, so something weird is possible now!
Let me tell you a secret by the way. In fact, ghosts do exist, because in 2010, scientists around the world have verified it (talking to ghosts). In fact, ghosts are a kind of force wall in the human brain. , what we say about ghosts possessing the body is also well-founded. In fact, it is the power wall of ghosts that interferes with people's brain waves and causes people to hallucinate. Well, so, the world is really full of wonders. If you still have such questions, remember to contact me. ah.
I will be happy to answer your questions, (*^__^*) Hehe... remember to choose me~~